Symptoms

Today , I had sensitivity on nipples like it’s hurt for little when I took a shower . Then I had light cramping on my stomach . But then my stomach is bloated. I had been constipated. I’m very tired .last week on the app said I was ovulating. There was few days I had sexy time . My last period was sept 21st . When can I start taking a pregnancy test ? Can someone give me the best advice?